BD9890F-E2

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BD9890F-E2 is a digital step-down switching regulator with an integrated controller designed to meet various applications in the field of digital power management. The device uses an integrated controller that provides tight regulation and improved efficiency. It also provides a constant output current with the ability to adapt to different operating conditions. The device has an internal temperature protection circuit, which enables protection from over-temperature and over-voltage conditions. This device has a wide range of application in the field of power management and is used for powering different types of electronic components, such as microprocessors, FPGAs, ASICs and DSPs.

The BD9890F-E2 is a so-called buck converter, a switched-mode power supply. That is to say that it can generate a stable output voltage from an input voltage of significantly different value. This makes it suitable for power supply applications where the supply voltage can vary greatly over time. The device can work efficiently at the input voltage range between 4.5 V up to 16 V and depending on the load it can provide an output voltage between 0.7 V to 5.5 V. The device features integrated over-current, over-voltage, and over-temperature protection. This ensures that its performance is not affected during any harsh environmental conditions. The device features a switching frequency of 2.22 MHz, a current-limit range of 0.9 A to 2.2 A and a low 100 mΩ integrated power switch.

The working principle of the BD9890F-E2 is quite simple. It uses an internal switch to control the output current by switching the input voltage on and off. This creates a saw-tooth waveform that is used to regulate the output voltage. The output voltage is determined by the duty cycle, which is the ratio of on time to off time in the switch. The on time is controlled by the current limit, which is set by the resistor connected to the current sense pin of the device. When the current reaches the programmed limit, the switch is then turned off to prevent it from exceeding the limit. The device will then wait until the current drops below the programmed limit to turn the switch back on.

The device is also equipped with a POR (Power-On Reset) circuit which monitors the input voltage and generates an appropriate reset signal when the voltage drops below a predetermined voltage threshold. This is useful for preventing damage and malfunctions due to sudden changes in input voltage. The device is also equipped with an under-voltage lockout circuit which will shut down the device when the input voltage drops below a predetermined voltage level. The device is further protected from over-voltage and over-current conditions by a programmable over-voltage protection and a current limit circuit. These features improve the safety of the system and help to ensure that the device operates efficiently over time.

The BD9890F-E2 is an excellent device for the field of power management and can be used for various applications. It can be used to regulate the output voltage of microprocessors, FPGAs, ASICs and DSPs. It is suitable for use in automotive, medical, consumer and industrial applications. Its features such as over-voltage, over-current and over-temperature protection make it a reliable choice in power management.

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